SM32 or G scale Non-Polarized Magnetic Coupling-Three pairs. To fit both SM32 scale or G Scale Non-Polarized Magnetic Coupling To fit as first time coupling or, To Convert an Accucraft chopper coupling, to a non-polarized magnetic coupling. Contains - 3 pairs MAGNETIC COUPLINGS Non-polarized with Base for Standard gap between rolling stock. Complete with a split cotter 2-off, washers 4-off and No.2 x 6.5 mm self tapping screw 4-off. There is no A & B end these couplings will work either way round that you place your rolling stock / locos guaranteed mating no fuss. Price includes postage.